216056413 has 4 divisors (see below), whose sum is σ = 217305468. Its totient is φ = 214807360.

The previous prime is 216056333. The next prime is 216056437. The reversal of 216056413 is 314650612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161340804 + 54715609 = 12702^2 + 7397^2 .

It is a cyclic number.

It is not a de Polignac number, because 216056413 - 2¹⁷ = 215925341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216056483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624268 + ... + 624613.

It is an arithmetic number, because the mean of its divisors is an integer number (54326367).

Almost surely, 2^216056413 is an apocalyptic number.

It is an amenable number.

216056413 is a deficient number, since it is larger than the sum of its proper divisors (1249055).

216056413 is a wasteful number, since it uses less digits than its factorization.

216056413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249054.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 216056413 is about 14698.8575406390. The cubic root of 216056413 is about 600.0522297126.

The spelling of 216056413 in words is "two hundred sixteen million, fifty-six thousand, four hundred thirteen".